Place files in Packages/User
and restart sublime text
git clone git://github.com/bmx666/scs-syntax-highlighter.git
cd ./scs-syntax-highlighter
cp scs.tmLanguage ~/Library/Application\ Support/Sublime\ Text\ 3/Packages/User
git clone git://github.com/bmx666/scs-syntax-highlighter.git
cd ./scs-syntax-highlighter
cp scs.tmLanguage ~/.config/sublime-text-3/Packages/User/
git clone git://github.com/bmx666/scs-syntax-highlighter.git
cd ./scs-syntax-highlighter
copy scs.tmLanguage "%APPDATA%\Sublime Text 3\Packages\User"